John s



(No Model.)

J. S. JONES.

- CONDUCTOR FOR MECHANICAL TELEPHONES.

No. 353,684. Patented Dec, 7, 1886.

WITNESSES: INVENTOR A TTORNEYS' UNITED STATES PATENT OFFICE.

JOHN S. JONES, OF BROOKLYN, NEYV YORK CONDUCTOR FOR MECHANICAL TELEPHONES.

SPECIFICATION forming part of Letters Patent No. 353,684, dated December '7 1886.

Application filed March 11, 1886. Serial No. 194,855.

To all whom it may concern-.-

Beit known that I, JOHN S. JONES, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Conductors for Acoustic or Mechanical Telephones, of which the following is a specification.

My invention relates to a conductor which is adapted to convey the'sound-vibrations generated in the transmitting-phone to the receiving-phone withoutany sensibleloss or decrease of force orintensity ovcrareasonable distance, and at the same time is so constructed as to shut out all foreign noises and disturbances which may be taking place in the neighbor hood of either of the phones or along the route of the conductor.

Referring to the accompanying drawings, Figure 1 represents a transmitting and a re ceiving phone connected together by my improved conductor. Fig. 2 is a view of my conductor with a portion broken away to show (No model.)

its inside construction. Fig. 3 is a crosssection.

In the drawings, T is a transmitting and R a receiving phone.

A is a wire, of iron, steel, or copper, which is overlaid and enveloped by a coating of lead, 13.

The result produced is as above describednamely, a new and vastly greater effect on the receiving-diaphragm of the instrument R.

Having thus described my invention, what I claim as new therein, and desire to secure by Letters Patent, is

A conductor for acoustic or mechanical telephones,which consists of acentral wire or wires formed of steel, iron, or some other hard metal, with a sound-deadening cover or envelope, consisting of lead or some other soft metal.

JOHN S. JONES.

lVitnesses:

GABRIEL J. W. GALSTER, E. ESTOPPEY. 

